Smart technologies automated coatings

Patent metadata

Field	Value
Publication number	US-9839936-B2
Application number	US-201514818099-A
Country	US
Kind code	B2
Filing date	Aug 4, 2015
Priority date	Aug 4, 2015
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A system and method for applying coatings to an object in a spray booth. The system and method include at least one robot that is operable to spray a coating on the object and at least one robot that includes a non-contact metrology sensor that is capable of measuring the object to determine the exact location of the object and the exact shape of the object. The sensor is also capable of measuring the thickness of the coating as it is sprayed on the object. The system and method further include a computing subsystem that is programmed to receive the measurements from the non-contact metrology sensor, where the measurements are used to determine spray paths and to adjust the spray paths for the at least one robot that is operable to spray the coating such that the object is sprayed with a coating that is within predetermined coating thickness tolerances.

First claim

What is claimed is:

1. A system for applying coatings to an object in a spray booth, said system comprising:
at least one robot that is operable to spray a coating on the object in the spray booth;
at least one robot that includes a non-contact metrology sensor, wherein the non-contact metrology sensor is capable of measuring the object in the spray booth to determine an exact location of the object in the spray booth and an exact shape of the object in the spray booth, said non-contact metrology sensor further being capable of measuring a thickness of the coating as it is sprayed on the object in the spray booth; and
a computing subsystem that is programmed to receive the measurements from the non-contact metrology sensor and provide the location of the object, the shape of the object and the thickness of the coating, said computing subsystem further being programmed to determine spray paths and adjust the spray paths for the at least one robot that is operable to spray the coating such that the object is sprayed with a coating that is within predetermined coating thickness tolerances.

2. The system according to claim 1 wherein the at least one robot that is operable to spray a coating and the at least one robot that includes the non-contact metrology sensor are the same robot.

3. The system according to claim 1 wherein the at least one robot that is operable to spray a coating and the at least one robot that includes the non-contact metrology sensor are different robots.

4. The system according to claim 1 wherein the computing subsystem is further programmed to use the measurements from the non-contact metrology sensor such that the location of the object in the spray booth and the exact shape of the object in the spray booth are used to determine the spray paths for the at least one robot that is operable to spray the coating.

5. The system according to claim 1 wherein the computing subsystem is further programmed to use coating thickness measurements from the non-contact metrology sensor to adjust the spray paths of the at least one robot that is operable to spray the coating such that a final coating thickness that is applied to the object is within the predetermined coating thickness tolerances.

6. The system according to claim 1 wherein the computing subsystem is further programmed to store data regarding coatings applications for objects that are coated in the spray booth and to compare the stored data such that future coatings applications are improved by optimizing the spray paths.

7. The system according to claim 1 wherein the object is located within approximately twelve inches of a predetermined object alignment location in the spray booth.

8. The system according to claim 1 wherein the computing subsystem is further programmed to apply a one or more coatings to the object before coating thickness is measured, or to apply a coating to a portion of the object and measure a coating thickness of the portion before a next coating is applied to a next portion of the object.

9. A system for applying coatings to an object in a spray booth, said system comprising:
a plurality of robots that are operable to spray a coating on the object in the spray booth;
a non-contact metrology sensor mounted to each of the plurality of robots, wherein each of the non-contact metrology sensors are used to measure the object in the spray booth to determine an exact location of the object in the spray booth and an exact shape of the object in the spray booth, said non-contact metrology sensors further being capable of measuring a thickness of the coating as it is deposited on the object in the spray booth; and
a computing subsystem that is programmed to receive the measurements from the non-contact metrology sensors and provide the location of the object, the shape of the object and the thickness of the coating, said computing subsystem further being programmed to determine spray paths for each of the plurality of robots such that the object is sprayed with a coating that is within predetermined coating thickness tolerances, said spray paths being determined by the computing subsystem using the measurements from the non-contact metrology sensors such that the location of the object in the spray booth and the exact shape of the object in the spray booth are used to determine the spray paths for each of the plurality of robots, said computing subsystem further programmed to use the measurements of coating thickness as the coating is being applied to adjust the spray paths as needed to ensure the coating thickness that is applied to the object is within the predetermined coating thickness tolerances.

10. The system according to claim 9 wherein the computing subsystem is programmed to adjust the spray paths by adjusting one or more of robot speed, material flowrate, air pressure, stepover distance, standoff distance or robot position of at least one of the plurality of robots.

11. The system according to claim 9 wherein the non-contact metrology sensor is mounted to each of the plurality of robots by swapping out a spray tip for the sensor.

12. The system according to claim 9 wherein the computing subsystem is further programmed to store data regarding coatings applications for objects that are coated in the spray booth and to compare the stored data such that future coatings applications are improved by optimizing the spray paths.

13. The system according to claim 9 wherein the computing subsystem is further programmed to apply the coating to an entire object before a coating thickness is measured.

14. The system according to claim 9 wherein the computing subsystem is further programmed to apply the coating to a portion of the object and a coating thickness of the portion is measured before a next coating is applied to a next portion of the object.

15. A method that includes a computing subsystem that is programmed for applying coatings to an object in a spray booth system, said method comprising:
positioning the object in the spray booth;
measuring the object in the spray booth using a sensor robot that includes a non-contact metrology sensor;
determining an exact location of the object in the spray booth;
determining an exact shape of the object in the spray booth;
determining spray paths for a spray robot that is operable to spray a coating on the object using the exact location and the exact shape of the object;
spraying a coating on the object using the spray robot, said spray robot including a spray tip;
measuring a thickness of the coating using the sensor of the sensor robot; and
adjusting the spray paths using the measurements of the thickness of the coating such that a next coating that is applied to the object is within predetermined coating thickness tolerances.

16. The method according to claim 15 wherein adjusting the spray paths includes adjusting one or more of robot speed, material flowrate, air pressure, stepover distance, standoff distance or robot position of the spray robot.

17. The method according to claim 15 wherein the spray robot and the sensor robot are the same robot by including both a spray tip and a sensor, or by swapping the spray tip and the sensor as needed.

18. The method according to claim 15 further comprising storing data regarding coatings applications for objects that are coated in the spray booth and comparing the stored data such that future coatings applications are improved by optimizing the spray paths.

19. The method according to claim 15 wherein positioning the object in the spray booth in

Assignees

• Northrop Grumman Systems Corp

Inventors

• Hoffman Guy C
• Heron Jason

Classifications

• G01B1/00

  Measuring instruments characterised by the selection of material therefor · CPC title

• B05D1/02 Primary

  performed by spraying · CPC title

• B05B13/0431

  with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to three-dimensional [3D] surfaces · CPC title

• B05B12/084 Primary

  responsive to condition of liquid or other fluent material already sprayed on the target, e.g. coating thickness, weight or pattern · CPC title

• G01B21/08

  for measuring thickness · CPC title